SpaceObservatory

This is an easy add-on for you to observe your ObjectSpace.

Main Features

Pure ruby. NO C extensions.
Drop-in design that requires NO modifications to your program.
Minimal overhead. Does all jobs except data collection in a separate process.
Native support Rails, Sinatra, and non-Web daemons.

Installation

As usual.

NOTE however that as of this writing, WEBrick do not support websockets (necessary for this lib). You need a websockets-aware rack handler like Puma, Passanger, whatever.

Usage

on Rails

gem 'space_observatory', require: 'space_observatory/railtie'

And you are done.

Pure Rack / Sinatra / Padrino etc

gem 'space_observatory', require: 'space_observatory/rack_middleware'

Also in your config.ru file add:

use SpaceObservatory::RackMiddleware

Versatile use case including non-Web daemons

bundle exec with-space-observatory.rb --port=1234 -- ruby bin/rails server --port=5678

This command starts two HTTP servers on ports 1234 and 5678 each. 1234 (for this case) is for probing object space of rails server which listens port 5678.

with-space-observatory.rb --help might expose more option(s).

TODOs

Probing is slow. Should cache.
JSON is valid, but not that pretty.